By and large, we are taught that deforestation leads to environmental degradation and other environmental problems. In fact, the problems created by deforestation are atrocious for all organisms. We all know about its impact on the environment. Having said that, what about its impact on the human? I would like to draw your attention to the link that exists between deforestation and human disease. I would like to start with a case study so that a better understanding is developed in analyzing the correlation. Case Study of Deforestation in Borneo Island Borneo is the largest island of Asia and third-largest island in the world. It is shared both by Malaysia and Indonesia. It is one of the oldest rainforests in the world. But it seems like very soon, we will be replacing ‘is’ with ‘was’.